When stars gather for Music's Biggest Night on Sunday, they will be serenaded by Bruno Mars, Rihanna and Sting, who have just signed on for a special Grammy performance. Also new to the performance bill is Kelly Clarkson.

Hot off her Super Bowl halftime show, 16-time Grammy winner Beyonce will appear as a presenter, as well as Prince, Jennifer Lopez and actor Pauley Perrette.

Clarkson has three nominations: record of the year, best pop solo performance for "Stronger (What Doesn't Kill You)" and best pop vocal album for "Stronger."